diff --git a/htdocs/compta/facture/class/facture.class.php b/htdocs/compta/facture/class/facture.class.php
index 3d37de709c1..af8caa73b12 100644
--- a/htdocs/compta/facture/class/facture.class.php
+++ b/htdocs/compta/facture/class/facture.class.php
@@ -569,6 +569,7 @@ class Facture extends CommonInvoice
 				$this->type = self::TYPE_STANDARD;
 			}
 			$this->ref_client = trim($this->ref_client);
+			$this->ref_customer = trim($this->ref_customer);
 			$this->note_public = trim($this->note_public);
 			$this->note_private = trim($this->note_private);
 			$this->note_private = dol_concatdesc($this->note_private, $langs->trans("GeneratedFromRecurringInvoice", $_facrec->ref));